I deleted the incoherent babbling I previously posted and narrowed it down to this:
Why would I get a BEN value of less than 1 if the cell is alread too lean?
more specifically:
In cell, 1200 rpm X 100kPa, my WB02 read an AVG of 15.48:1 (127 counts eek)
The BEN factor for that same cell is .93
Does that make any sense to anyone?
Shouldn't it be greater than 1?